While shopping around this weekend I came across two fabulous pop-up books perfect for boys of all ages...heck, I was even taken by them and most plastic toy aisle warriors don't do that for me! Encyclopedia Prehistorica Dinosaurs: The Definitive Pop-Up and Encyclopedia Prehistorica: Sharks and Other Sea Monsters are a popping good time! Each page folds, pops and teaches information about animals with its colorful illustrations and interactive pop-ups.